Thought it was terrific and felt so fresh and different compared to other finales we've had under Moffat. Think the Nethersphere concept is really creepy and was a great way to bring back The Master and the Cybermen in the same episode.

Obviously the main talking point us the big reveal, got no problem with Missy being The Master at all and think Michelle Gomez is very good, though the kissing and flirting between her and The Doctor just had to happen, didn't it? Haha.

Missy is a national treasure. The Master is a trans woman.

Death in Heaven really doesn't live up to the fun I had with Dark Water, and I feel that overshadows some really well put together moments. Clara's big confrontation with the Doctor I found a little overplayed at first, and it does suffer severely from the way Danny was handled up until this point. If he had just been written a bit better this episode could have hit really hard. I do think Samuel Anderson makes it pretty clear that was never on him though - he was handed a pretty rotten role but here, actually engaging with the world around him in a non-cynical way - he was pretty good.

I also love the Cyberman and Missy reveals, which are just executed in a great blend of fun, nostalgia, and even in a way I really didn't see coming at first. It was all pretty delightful, and I think it is easy to forget the initial surprise of Missy. I was sure excited when I realized who Michelle Gomez was though, and, in hindsight, Moffat did a pretty good job at living up to the hype of her introduction. So, yeah, it's not a perfect episode, but it sure was an unforgettable one that I just loved, in spite of its flaws.